(A) Establishment. The City Commission shall take necessary steps to establish a rate schedule for sewer service that assures an equitable system of cost recovery. The purpose hereof is that the industrial users shall pay for the costs incurred by the City Commission in the construction, operation, and maintenance of that portion of the wastewater facilities related to industrial wastes.
(1981 Code, § 28-173)
(B) Conditions to be satisfied in structuring. The cost recovery system shall satisfy the following conditions.
(1) The apportionment of costs must take into consideration the individual industrial user’s contribution as related to the total waste load taking into account the volume and strength of all discharges.
(2) The costs to be considered should include, but are not limited to:
(a) Amortization of the applicant’s indebtedness for the cost of the treatment facilities (plant and interceptors);
(b) Operation and maintenance of the treatment facilities; and/or
(c) Any additional costs which are necessary to assure adequate treatment on a continuous basis.
(3) Substantial prepayment of the capital investment or other financial commitments will be required from each industry that contributes 30% or more of the total volume or strength of the waste load to be treated by the project.
(1981 Code, § 28-174)
(C) Charges. A charge will be assessed against persons discharging industrial liquid wastes which are of a greater strength and volume than normal, untreated domestic wastewater. Normal, untreated domestic wastewater is defined as having a maximum yearly average biochemical oxygen demand and chemical oxygen demand not in excess of 200 milligrams per liter and 400 milligrams per liter, respectively. The same sewage is considered to contain settleable solids not in excess of 5 milliliters per liter.
(1) The annual industrial charge will be the largest value which results from application of the following mathematical relationships:
OR
(2) Where:
(a) IC = Industrial charge, dollars per year;
(b) V = Volume discharge, gallons per year;
(c) SS = Settleable solids of a given industrial waste, ml/l;
(d) a = That fraction of the total cost which is attributable to settleable solids removal;
(e) b = That fraction of the total cost which is attributable to either chemical oxygen demand removal or biochemical oxygen demand removal;
(f) A = Basic annual charge levied for being connected; whether or not sewage or other wastewaters are being discharged to the system, dollars per year;
(g) K =Annual charge per unit volume of waste, dollars per million gallons;
(h) COD = Chemical oxygen demand of a waste, mg/l; and
(i) BOD = Biochemical oxygen demand of a waste, mg/l.
(3) If settleable solids concentration is less than 5 ml/1, chemical oxygen demand is less than 400 mg/l, and biochemical oxygen demand is less than 200 mg/1, the charge shall be based on volume alone, and the following formula shall apply, with the terms as defined above:
(1981 Code, § 28-175)
(Ord. 605, passed 7-11-1972)